500 



rUOK. C. L. BOULENGER ON FILARIID 



Poliopsar leucocejihalus ; in their measurements they agree fairly 

 well with the worms described by v. Linstow (1891) as belonging 

 to this species. My material consisted of females only. 



Specijic diagnosis. — Dvplotriama : Body long, filiform, tapering 

 close to the anterior and posterior extremities which are of 

 approximately the same thickness. Cuticle not transversely 

 ringed. 



Text-figure 8. 



VUr 



va. 



Diplotriceiia tricuspis (Fedtsch.). 

 Lateral view of anterior extremity of female. X 120. 

 , anterior region of oesophagus ; nr., nerve-ring; p.m., posterior region of 

 oesophagus; ir., trident ; ■;;«., vagina; ««(., vulva. 



Six head-papilla? ; the four submedian are very small and 

 inconspicuous. The oesophageal trident has a length of 0-15 mm. : 

 its anterior stem is ti-uncated. 



CEsophagus consisting of a short anterior i-egion and a very 

 long posterior region. The nerve-ring surrounds the anterior 

 oesophagus about 0-25 mm. from the anterior extremity. 



Female 160-180 mm. long; the greatest breadth of the body is 

 about 0-6 mm. 



The narrow anteiior region of the a^sophagus has a length of 



